This episode won an Emmy. It covers the sarcophagus built to contain the remains of the destroyed reactor and the work of the Russian scientists, staff and soldiers who risked and continue to risk their lives in the clean-up operation. I think this is the 1996 updated version of the original 1991 program and includes an extra 10 minutes of interviews with several of the original scientists. It is shorter than the 60 minutes described on the BBC website and may have been edited."